Function open_simplex_test

src/open_simplex.rs:80–104

()

    use super::*;
    #[test]
    fn open_simplex_test() {
        let permutation = Permutation::from_seed(make_seed(09512));

        let mut img = image::RgbaImage::new(512, 512);
        let mut min = f32::INFINITY;
        let mut max = f32::NEG_INFINITY;
        for y in 0..512 {
            for x in 0..512 {
                // let (xf, yf) = make_uv(x, y);
                // let noise = perlin(&perm, xf * 10.0, yf * 10.0);
                let noise = open_simplex_2d(&permutation, (x as f32 + 0.0) * 0.01, (y as f32 + 0.0) * 0.01);
                if noise < min {
                    min = noise;
                }
                if noise > max {
                    max = noise;
                }
                let norm = ((noise + 1.0) / 2.0).clamp(0.0, 1.0);
                let gray = (norm * 255.0) as u8;
                img.put_pixel(x, y, Rgba([gray, gray, gray, 255]));
            }
        }
        println!("Min: {min:.7}\nMax: {max:.7}");
        img.save("noise.png").expect("Failed to save image.");
    }
}